1*01c621f3SFrançois Tigeot /* 2*01c621f3SFrançois Tigeot * Copyright (c) 2015 François Tigeot 3*01c621f3SFrançois Tigeot * All rights reserved. 4*01c621f3SFrançois Tigeot * 5*01c621f3SFrançois Tigeot * Redistribution and use in source and binary forms, with or without 6*01c621f3SFrançois Tigeot * modification, are permitted provided that the following conditions 7*01c621f3SFrançois Tigeot * are met: 8*01c621f3SFrançois Tigeot * 1. Redistributions of source code must retain the above copyright 9*01c621f3SFrançois Tigeot * notice unmodified, this list of conditions, and the following 10*01c621f3SFrançois Tigeot * disclaimer. 11*01c621f3SFrançois Tigeot * 2. Redistributions in binary form must reproduce the above copyright 12*01c621f3SFrançois Tigeot * notice, this list of conditions and the following disclaimer in the 13*01c621f3SFrançois Tigeot * documentation and/or other materials provided with the distribution. 14*01c621f3SFrançois Tigeot * 15*01c621f3SFrançois Tigeot * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16*01c621f3SFrançois Tigeot * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17*01c621f3SFrançois Tigeot * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18*01c621f3SFrançois Tigeot * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19*01c621f3SFrançois Tigeot * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20*01c621f3SFrançois Tigeot * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21*01c621f3SFrançois Tigeot * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22*01c621f3SFrançois Tigeot * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23*01c621f3SFrançois Tigeot * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24*01c621f3SFrançois Tigeot * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25*01c621f3SFrançois Tigeot */ 26*01c621f3SFrançois Tigeot 27*01c621f3SFrançois Tigeot #ifndef _LINUX_KTIME_H_ 28*01c621f3SFrançois Tigeot #define _LINUX_KTIME_H_ 29*01c621f3SFrançois Tigeot 30*01c621f3SFrançois Tigeot #include <linux/time.h> 31*01c621f3SFrançois Tigeot #include <linux/jiffies.h> 32*01c621f3SFrançois Tigeot 33*01c621f3SFrançois Tigeot /* time values in nanoseconds */ 34*01c621f3SFrançois Tigeot union ktime { 35*01c621f3SFrançois Tigeot int64_t tv64; 36*01c621f3SFrançois Tigeot }; 37*01c621f3SFrançois Tigeot 38*01c621f3SFrançois Tigeot typedef union ktime ktime_t; 39*01c621f3SFrançois Tigeot 40*01c621f3SFrançois Tigeot static inline int64_t ktime_to_ns(ktime_t kt) 41*01c621f3SFrançois Tigeot { 42*01c621f3SFrançois Tigeot return kt.tv64; 43*01c621f3SFrançois Tigeot } 44*01c621f3SFrançois Tigeot 45*01c621f3SFrançois Tigeot static inline struct timeval ktime_to_timeval(ktime_t kt) 46*01c621f3SFrançois Tigeot { 47*01c621f3SFrançois Tigeot return ns_to_timeval(kt.tv64); 48*01c621f3SFrançois Tigeot } 49*01c621f3SFrançois Tigeot 50*01c621f3SFrançois Tigeot static inline ktime_t ktime_add_ns(ktime_t kt, int64_t ns) 51*01c621f3SFrançois Tigeot { 52*01c621f3SFrançois Tigeot ktime_t res; 53*01c621f3SFrançois Tigeot 54*01c621f3SFrançois Tigeot res.tv64 = kt.tv64 + ns; 55*01c621f3SFrançois Tigeot return kt; 56*01c621f3SFrançois Tigeot } 57*01c621f3SFrançois Tigeot 58*01c621f3SFrançois Tigeot static inline ktime_t ktime_sub_ns(ktime_t kt, int64_t ns) 59*01c621f3SFrançois Tigeot { 60*01c621f3SFrançois Tigeot ktime_t res; 61*01c621f3SFrançois Tigeot 62*01c621f3SFrançois Tigeot res.tv64 = kt.tv64 - ns; 63*01c621f3SFrançois Tigeot return kt; 64*01c621f3SFrançois Tigeot } 65*01c621f3SFrançois Tigeot 66*01c621f3SFrançois Tigeot #define NSEC_PER_SEC 1000000000L 67*01c621f3SFrançois Tigeot 68*01c621f3SFrançois Tigeot static inline ktime_t ktime_get(void) 69*01c621f3SFrançois Tigeot { 70*01c621f3SFrançois Tigeot struct timespec ts; 71*01c621f3SFrançois Tigeot ktime_t kt; 72*01c621f3SFrançois Tigeot 73*01c621f3SFrançois Tigeot nanouptime(&ts); 74*01c621f3SFrançois Tigeot kt.tv64 = (ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec; 75*01c621f3SFrançois Tigeot return kt; 76*01c621f3SFrançois Tigeot } 77*01c621f3SFrançois Tigeot 78*01c621f3SFrançois Tigeot #endif /* _LINUX_KTIME_H_ */ 79